Bmile brouillet



(No Model.)

B. BROUILLET.

HIGH PRESSURE SIGNAL.

No. 362,420. Patented May s, 1887.

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. 11w TOR: WITNESSES 1 gwfi/ M 5A By his Attorneys A N4 PETERS, PhOlo-Utbognpher. Washington DAL A UNITED STATES EErcE.

PATENT EMILE BROUILLET, oE PARIS, FRANCE, ASSIGNOR TO THE SOCIETY DEVRIES & 00., E SAME PLACE.

HIGH-PRESSURE. SIGNAL.

SPECIFICATION forming part of Letters Patent No. 362,420, dated May 3, 1887.

Application filed October 80, 1886. Serial No. 217,567. (No model.) Iatented in France Septemberll. 1885, No.l7l,l'.ll.

To all whom it may concern:

Be it known that I, EMILE BROUILLET, a citizen of France, of Paris, in the Republic of France, have invented certain new and useful Improvements in High-Pressure Signals, (for which Letters Patent were heretofore granted to me by .the Government of France, dated September 11, 1885. No. 171,131,) of which-the following is a specification.

This invention relates to improvements in devices for giving an alarm orsignal when the pressure in a steam-boiler exceeds a certain pressure.

The invention consists in the combination, I 5 with a casing connected with the generator, of

a safety-valve and alarm,'such as a whistle and a diaphragm in said box, a slidingbolt operated by the diaphragm, and a pane of glass against which the bolt'rests, which pane-.of glass is broken when-tne5ressure enceeds the desired limit of pressure.

In the accompanying drawings Figure l is a cross-sectional view of my improved highpressure signal. Fig. 2 is a front view of the same. Fig. 3 is a sectional view on the line :0

3 Fig. 1.

Similar letters of reference indicate corresponding parts.

The box A is provided with the neck B, by means of which it is fastened on the steamgenerator. Said box is composed of two sections, A A between which a diaphrag mg, is held, said diaphragm beingcomposedofa sheet of copper or like material. By separat- .35 ing the box into the two compartments A A",

by means of the diaphragm G, the compartment A is not, and the compartment A is, in communication bynieans of the neck B with the generator.

The compartment A is provided with a laterally-projecting neck, L, in communication with achamber, I), containing a plunger, a, on which one end of a lever, d, rests, said lever at being screw-threaded and provided with a wheel,f, which acts as aweight. The box 11 is provided with a pipe, I, which may be connected with a whistle or like alarm.

The compartment N, which is not in communication with the generator, is provided at the upper part with an outlet-pipe, 0. That side P of the compartment A facing the plate G is provided with an aperture, S, around which the internally projecting neck R is formed, on which neck R the tube H is held, which is provided at the end adjacent to the 5 5 plate G with the beveled or pointed teeth D, .the ends of which rest against the said plate G. A pin. I, or bolt is mounted to slide in the aperture S and in the bore of the neck It, its outer pointed end resting againsta glass plate, K, held in the outer surface of the box A by a clamping-ring, M. On the opposite end of the pin I a piston or head, D", is formed, whichis a very short distance from the surface of the plate G, and is guided bythe tube H.

\The operationis as follows: When the engineer leaves his engineroom, he adjusts the 'weightor wheel f in the proper position on the legend, so that when the pressure in the boiler reaches a certain limit it raises the plunger a and also the lever d, thus permitting'the steam to dscape throughitl e pjpe iynl to sound the whistleor other alarin lf'the pressure still increases and there is danger of an explosion in the generator, the pressure in the compartment A, which is the same as that in the generator, gradually increases, as doesalso the pressure upon the diaphragm or plate G, whereby the pointed teeth of the tube H are forced through said plate, forming apertures which permit the steam to pass from the compartment A to the compartment A and out through the pipe Q41" The plate G is also pressed against the /head 'orpiston D of the bolt or pin I, whereby the pointed end of the said bolt or pin is pressed against the glass pane K,,which is broken. WVhen the engineer or person in charge returns to the engineroom, he knows that the pressure has exceeded the given limit and the steam has been permitted to escape in the manner described.

The plate G must be of sufficient thickness that it will only bend at a certain pressure,

and it is thus evident that different plates G must be used for different pressures. The apparatus is very reliable and safe and in all cases prevents explosions.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a high-pressure signal, the combina- Loo tion, with a casing, of a metal diaphragm in the same and fixed pointed teeth in said frame, substantially as shown and described.

2. In a high-pressure signal, the combination, with a casing, of asheet-metal diaphragm in the same, a sliding bolt having one end adjacent to said diaphragm, and a fixed glass plate resting against the other end of the bolt, substantially as shown and described.

3. In a high-pressure signal, the combination, with a casing connected with the steamgenerator, of a sheet-metal diaphragm in the same, which divides the easing into two compartments, pointed teeth adjacent to the diaphragm in one compartment, and an outletpipe connected with the said compartment, the other compartment being connected with the boiler, substantially as shown and described.

4. In a high-pressure alarm, the combina tion, with a casing connected with the boiler, of a sheet-metal diaphragm dividing the easing into two compartments, a tube having pointed teeth adjacent to one side of the diaphragm in one compartment, which is not (3011' nected with the boiler, a sliding pin having a head within the toothed tube, a glass plate held in the side of the compartment, against which glass plate the pin rests, and an outletpipe for the compartment not connected with the boiler, substantially as shown and described.

5. In a high-pressure alarm, the combination, with a casing connected with the generator, of a diaphragm in said casing, which dia phragm divides the easing into two compartments, the outlet-pipe O, the tube H, having pointed teeth, the sliding belt I, glass plate K, the tube L, the chamber 1), the plug a, the weighted lever (I, and the outlet-pipe t, substantially as shown and described.

In testimonytha-t I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

EMILE BHOU ILLE'I.

\Vitnesses:

CH. M rnmu CHARLES, oton'r. M. I'Ioornn. 

